controller here. fortunately, the power is turned off. >> this room was built in 1913, but the national elevator cut actually was not introduced until 1921. >> tell us about this antique controller. what makes it different from a modern controller? >> the elevator is running on the original d.c. power. really simple in operation. does not include a lot of the features we would have in an elevator today, automatic door operation, dispatching, push button operation. none of those features are present, but this is the original from 1913. on this side, we have all the relays that actually control the elevator. the safety service -- city circuit, position, speed, and control of the power to the motor. >> here is a really interesting piece of historic machinery.